Cutter for mowers, reapers, harvesters, and the like.



J. L. AUBLE.

CUTTER FOB. MOWERS, REAPERS, HARVESTBRS, AND THE LIKE.

APPLICATION FILED JUNE 14, 1911.

1,1 1 3,944. 1 Patented Oct. 20, 1914.

UNITED sTATEs PATENT OFFICE.

JAMES L. AUBLE, or CINCINNATI, OHIO, ASSIG-NOR or one-HAL Ton. A. BARRETT,

or omcrmmavr, OHIO. g a

CUTTER non Mownns, Reunite, HARvE's'TnRs, AND rim LIKE.

To all euhom it may concern: 1.

Be it known that I, JAMEsL. AUBLE, a

a certainnovel and useful Cutter for Mowers, Reapers, Harvesters, and the like, of which the following is 'afull, clear, ,and ex act description, reference being had to the accompanying drawing, formmg part of this specification. 1 1 a The object of my invention isto provide a cutting tooth construction for mowers which shall be. strong and durable, readily and easily manufactured, notliable to bend or spring under the strains to it which it. is subjected, and which shall be selfsharpening and shall automatically take up the wear when in use. a

The invention is especially adapted for use in lawnmowers and'the like, in which a series of individual cutters or cutting teeth are arranged in a horizontal row and actuated simultaneously in advancing the machine to shift the cutting edge of one member with reference to the cutting edge of the other member to give a shearing cut for the cutters. v

The invention consists in providing a whereby the oscillation or rotation of the. one member on the other will present shear ing cutting cut.

surfaces to the material to be In the drawing, Figure 1 is a plan view of a portion of a series of the individual cutters as arranged to form the cutter of a lawn mower. Fig. 2 is a CGIltI'illVBItlCLl section of one of the individual cutters, Fig.

3 is a central horizontal section of the ink dividual. cutter, viewed from the bottom Fig. tie a perspective v1ew 'of the sheath member. Fig. 5 is a perspective view of the f cutting tooth. Fig.6 is are'ar end view of two of the individual cutters as illustrated in Fig. 1. a

As illustrated in the drawing, the fixed I i sea filed June 14, 1911 1 Seria1No.633 ,168.

1 member of the individual cutter comprises a solid and substantial metallic sheathl, provided with a centralcylindrical .bore 2, which bore, for the forward part of the sheath, is preferably 'flaredj outwardly. to form a conical surface 3. The sheath is also beveled or cut away at 4, 5, for opposite sp ifi i n tw aemaused oet.2o",'1914.

sides, and these beveledcuts are preferably made slightly curved, as shown in Fig. 2.

a By thus cutting the sheath, curved cutting.

edges 6, 7, areprovided at the forward end of the'sheathon the inside.

Seated in the cylindrical and conical socket in the sheath is the cutting tooth, provided with a cylindrical portion 8 and a conical portion 9, corresponding with the conicaljinnersurface of the sheath. This tooth is cutaway or beveled at 10, 11, on curved surfaces to a substantially pointed end 12,- and straight cutting edges 13, 14, are thus provided for the cuttingtooth at the intersections of the curved planesurfaces 10, 11,,with the conical surface 9; and

cutting edges 6, 7 of the sheath dent; and while I prefer tofprovide the conical surfaces, 1 do not wish to be limited to this construction. The reason a for forming a conical seatis'that, inasmuch as the pressure on the cutting teeth is from the front as the parts wear, this wear will be taken up. I also prefer to bevel the sheath' and tooth with curved surfaces, as this provides a somewhat sharper edge for the cutting edges, but it will beunderstood that the curved surfaces are not essential, as the sam'e kind of cutting edge could be formed by cutting away the parts'on simple plane surfaces. j i

In order that my improved cutter may be used for a lawn mower, or reaper, and that the series of individual teeth may be readily secured together in close proximity to each otherfor any width of built-up cutter desired, I prefer to fiatten the outer surfaces of the rear portion of the sheath, forming the fiat surfaces 15, 16, for the four sides, and the individual cutters are placed to,- gether and-secured rigidly in position by theplates 17 l8, and bolts 19, whichv extend betwee-nthe two plates and preferably pass down throughsemi-cylindrical grooves 20, 21, in the-side faces of the rear portion of each sheath, and the parts are tightly clamped together by the nuts 22.

In order to oscillate or rotate each tooth simultaneously in cutting, the cylindrical portion 8 of each tooth extends to the rear of the sheath land is provided with a segment gear 23, secured thereon, and these segment gears are engaged by a rack bar 24, which, in the progress of the machine, is reciprocated by any convenient mechanism.

In order to take up the wearand hold the cutting edges of the two members of the cutter in contact, I provide a socket 25 in the rear end of each sheath, in which are seated spring washers 26, which bear between the base of the socket and the segment gear.

In the construction as illustrated, it is only intended to oscillate the cutting teeth in the sheaths, and in this construction I prefer to use the upper cutting edge 6 of the sheath member for the'cutting edge; but of course, if desired, the lower edge 7 can be used as the cutting edge, or in certain instances the teeth may be rotated, and both' edges will then form the cutting edges, and the tooth will cut alternately above and below. As employed in the claims, therefore, the terms rotary and rotating are used in a generic sense to cover the idea of a complete or partial movement of rotation and such movement in either direction. I

My construction of cutter forms a most effective cutting device, in that the cooperating members can be formedstilf and rigid so that the cutting edges cannot spring apart under thestrain, and thus allow the grass to wedge in between the cutting surfaces. The angle of the cone surfaces with the axis is formed sufiiciently abrupt to prevent the cooperating'parts' from binding, and at the same time suificient length of cutting edge can be provided for effective use. The'pressure of the material to be cut tends to hold the members in close contact and the wear is Letters Patent, is

-1. A device of the character specified,

comprising a tubular member having a recess therein for a cooperating member and a bevel through its wall to form a longitudinally inclined cutting edge, a cooperating member inclosed in the tubular member and beveled to form a longitudinally inclined cutting edge and means for rotating one member with reference to the other to obtain a shearing cut.

2. A device of the character specified, comprising a tubular member having a conical recess at one end, a conical member to fit in said recess, a longitudinally inclined bevel through the wall of the tubular member, and a corresponding bevel on the conical member to form cutting edges at their ends and means for imparting rotary movement between the members to obtain a shearing cut.

3. A mower comprising a tubular member beveled through its wall on opposite sides toward its forward end to form longitudinal cutting edges where the beveled surfaces intersect the interior surface of the tubular member, a cooperating member fitting within said tubular member, and provided with a tapering cutting edge cooperating with the cutting edges on the tubular member and means for imparting a rotary movement between said cooperating members to obtain a shearing cut.

4. A cutter for mowers, comprising a series of tubular casings, arranged in a horizontal row, with each casing having its projecting end beveled above and below to form a curved recess, and a cutting tooth fitted within said casing having a substantially pointed beveled end, with means for simultaneously imparting a rotary movement between each tooth and its respective casing, for the purpose specified. 5. A cutter for mowers, comprising a series of tubular casings, with outwardly flared conical recesses, arranged in a horizontal row with each casing having its projecting end beveled above and below to form a curved recess, and a cutting tooth fitted within said casing, with. the conical surfaces coinciding, and having a substantially pointed beveled end, with means for simultaneously imparting a rotary movement between each tooth and its respective casing, for the purpose specified.

6. A cutter for mowers, comprising a series of fixed tubular casings, arranged in a horizontal row with each casing having its projecting end beveled above and below to form a curved recess, and a rotatable cutting tooth fitted within each casing, having a substantially pointed beveled end, with means for simultaneously imparting a rotary movement to the series of cutting teeth, for the purpose specified.

7. A cutter for mowers, comprising a series of fixed tubular casings, with outwardly simultaneously imparting a rotary moveflared conicalrecesses, arranged in a horiment to the series of cutting teeth, for the 10 zontal rou, with1 653.01%) casingdhgiaing itsfpropurpose specified. 'ectin en beve e a ove an e ow to orm i t curv ed recess, and a rotatable cutting itooth 1 JAMES AUBLE' fitted Within each casing, With-the conical Witnesses; p surfaces coinciding and having Iasubstan- FRANK W. KUNKEL, tially pointed beveled end, with means for EARL W. GRIFFIN.

Copies of this patent may be bbtained for five cents each, by addressing the "Commissioner of Patents,

7 Washington; I). O. 

